# US 10,502,655 B2 · Magnetic pressure sensors system for measurement and imaging of steel mass > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,502,655 B2 - Document ID: US10502655B2 - Status: Granted - Kind: B2 - Application number: 15/452,023 - Filed: 2017-03-07 - Published: 2018-09-13 - Granted: 2019-12-10 - Earliest claimed: 2017-03-07 - Assignees: Tech4Imaging LLC - Applicants: Tech4Imaging LLC - Inventors: Qussai Marashdeh; Mohd Harish; Christopher Zuccarelli - Web page: https://patentgrep.com/patent/US10502655B2 ## CPC - G01M 5/0091: {by using electromagnetic excitation or detection} - G01M 5/0033: {by determining damage, crack or wear} - G01M 5/0075: {by means of external apparatus, e.g. test benches or portable test systems (G01M5/005 takes precedence)} - G01M 5/0083: {by measuring variation of impedance, e.g. resistance, capacitance, induction} - G01N 17/006: {of metals} - G01M: TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR - G01N: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q) ## Abstract The present invention uses a magnetic source and pressure sensors mounted against a surface. Based on the mass of metal inside a volume, the magnetic source is attracted to the surface and exerts pressure on the pressure sensor that is proportional to the mass of metal being detected. An electronic device reads the pressure value and uses the information to quantify the metal in the surface or inside the volume of the construction component. ## Claims ### Claim 1 A system for determining an amount of metal in a construction member of cylindrical shape, the system comprising: a plurality of pressure sensors adapted to be placed around an exterior surface of the construction member of cylindrical shape; a plurality of magnetic sources, wherein each of the plurality of magnetic sources is paired with one of the plurality of pressure sensors, and wherein each pair of pressure sensor and magnetic source is arranged such that the pressure sensor is positioned between the respective magnetic source and the construction member of cylindrical shape during the system operation, and wherein each of the plurality of pressure sensors are adapted to sense pressure experienced at the pressure sensor resulting from attracting magnetic forces exerted between each of the plurality of magnetic sources and the metal in or within the construction member of cylindrical shape; a remote processing system in electronic communication with the plurality of pressure sensors and the plurality of magnetic sources, the remote processing system comprising one or more executable software routines, which when executed, configure the remote processing system to: 1) activate the plurality of magnetic sources; 2) measure the pressure sensed by each of the plurality of pressure sensors; and 3) determine the amount of metal in or within the construction member of cylindrical shape; and an intermediate structure placed between the construction member of cylindrical shape and the plurality of pressure sensors, the intermediate structure adapted to skid or roll on an outside surface of the construction member of cylindrical shape. ### Claim 2 (depends on 1) The system of claim 1, wherein the remote processing system comprises one or more additional executable software routines, which when executed, configure the remote processing system to: 1) construct a volume image of the construction member of cylindrical shape based upon the pressure measurements sensed by each of the plurality of pressure sensors. ### Claim 3 (depends on 1) The system of claim 1, further comprising: a plurality of switches, each of the switches operationally connected to one of the plurality of magnetic sensors. ### Claim 4 (depends on 1) The system of claim 1, wherein the intermediate structure is comprised of a thin plastic or polymer and a set of wheels. ### Claim 5 (depends on 1) The system of claim 1, further comprising: a plurality of current sources each operationally connected to one of the plurality of magnetic sources. ### Claim 6 (depends on 5) The system of claim 5, wherein each of the magnetic sources is comprised of windings configured to generate a magnetic field when activated by one of the plurality of current sources. ### Claim 7 (depends on 1) The system of claim 1, wherein each of the plurality of pressure sensors is adapted to generate a voltage signal proportional to the attractive magnetic forces between one of the magnetic sources and the metal in or within the construction member of cylindrical shape. ### Claim 8 (depends on 1) The system of claim 1, wherein the remote processing system comprises one or more additional executable software routines, which when executed, configure the remote processing system to calibrate the system based on a construction member having a known metal mass and location and determine metal mass in or within the construction member of cylindrical shape based upon calibration information. ### Claim 9 (depends on 1) The system of claim 1, wherein the pressure sensors are strain gauges. ### Claim 10 (depends on 1) The system of claim 1, wherein the remote processing system comprises one or more additional software routines, which when executed, configure the remote processing system to determine the thickness of metal of the construction member of cylindrical shape. ### Claim 11 A system for determining an amount of metal in a construction member of cylindrical shape, the system comprising: a plurality of pressure sensors adapted to be placed around an exterior surface of the construction member of cylindrical shape; a plurality of magnetic sources, wherein each of the plurality of magnetic sources is paired with one of the plurality of pressure sensors, and wherein each pair of pressure sensor and magnetic source is arranged such that the pressure sensor is positioned between the respective magnetic source and the construction member of cylindrical shape during the system operation, and wherein each of the plurality of pressure sensors are adapted to sense pressure created by attracting magnetic forces exerted between each of the plurality of magnetic sources and the metal in or within the construction member of cylindrical shape which result in compressive forces experienced at a sandwiched pressure sensor; a remote processing system in electronic communication with the plurality of pressure sensors and plurality of magnetic sources, the remote processing system comprising one or more executable software routines, which when executed, configure the remote processing system to: 1) activate the plurality of magnetic sources; 2) measure the pressure sensed by each of the plurality of pressure sensors; 3) determine the amount of metal in or within the construction member of cylindrical shape; and 4) generate a volume image of the metal in or within the construction member of cylindrical shape; and an intermediate structure placed between the construction member of cylindrical shape and the plurality of pressure sensors, the intermediate structure comprising a polymer housing and a set of wheels, wherein the intermediate structure is adapted to roll along an outside surface of the construction structure of cylindrical shape. ### Claim 12 (depends on 11) The system of claim 11, further comprising: a plurality of switches, each of the switches operationally connected to one of the plurality of magnetic sensors; and a plurality of current sources each operationally connected to one of the plurality of magnetic sources, wherein each of the magnetic sources is comprised of windings for generating a magnetic field when activated by one of the plurality of current sources, and wherein each of the plurality of pressure sensors is adapted to generate a voltage signal proportional to the attractive magnetic forces between one of the magnetic sources and the metal in or within the construction member of cylindrical shape. ### Claim 13 (depends on 11) The system of claim 11, wherein the remote processing system comprises one or more additional executable software routines, which when executed, configure the remote processing system to calibrate the system based on a construction member having a known metal mass and location. ### Claim 14 A system for determining an amount of metal in a construction structure having an exterior flat surface, the system comprising: a plurality of pressure sensors adapted to be placed on the exterior flat surface of the construction structure in a grid; a plurality of magnetic sources, wherein each of the plurality of magnetic sources is paired with one of the plurality of pressure sensors, and wherein each pair of pressure sensor and magnetic source is arranged such that the pressure sensor is positioned between the respective magnetic source and the construction structure during the system operation, and wherein each of the plurality of pressure sensors are adapted to sense pressure experienced at the pressure sensor resulting from attracting magnetic forces exerted between each of the plurality of magnetic sources and the metal in or within the construction structure; a remote processing system in electronic communication with the plurality of pressure sensors and the plurality of magnetic sources, the remote processing system comprising one or more executable software routines, which when executed, configure the remote processing system to: 1) activate the plurality of magnetic sources; 2) measure the pressure sensed by each of the plurality of pressure sensors; and 3) determine the thickness of metal in or within the construction structure; and an intermediate structure placed between the construction structure and the plurality of pressure sensors, the intermediate structure adapted to skid or roll on the outside surface of the construction structure. ### Claim 15 (depends on 14) The system of claim 14, wherein the remote processing system comprises one or more additional executable software routines, which when executed, configure the remote processing system to construct a volume image of the construction structure based upon the pressure measurements. ### Claim 16 (depends on 14) The system of claim 14, further comprising: a plurality of switches, each of the switches operationally connected to one of the plurality of magnetic sensors; and a plurality of current sources each operationally connected to one of the plurality of magnetic sources, wherein each of the magnetic sources is comprised of windings for generating a magnetic field when activated by one of the plurality of current sources, and wherein each of the plurality of pressure sensors is adapted to generate a voltage signal proportional to the attractive magnetic forces between one of the magnetic sources and the metal in or within the construction structure. ### Claim 17 (depends on 14) The system of claim 14, wherein the intermediate structure is comprised of a thin plastic or polymer and a set of wheels.